I don't drive my '93 after dark that much, even less during the summer when it stays light later. I spent the last week at the SCCA Runoffs and the days I drove to the track in my Miata and stayed late enough to drive home after dark I noticed a problem. When stopped at a light or stop sign with the headlights on, the idle drops, sometimes low enough to almost stall, just barely staying running.
Is this just a matter of adjusting the idle (I can do this, I've done it before) or is it a sign of a potential problem elsewhere?
Thanks, Jim